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I know plenty of people who think that sleep is unimportant. Or beyond that, they feel they maximize their productivity or value by sacrificing sleep. I’ve never held that this is true.

In college I pulled my fair share of all-nighters and I’ve been known to keep a late night or two—but I’ve always held that sleep is far more important than most people think, and that sacrificing it can actually be fairly costly as far as productivity, and at worst, can actually be quite dangerous.